CN115441972A - Digital train broadcasting system based on Ethernet - Google Patents
Digital train broadcasting system based on Ethernet Download PDFInfo
- Publication number
- CN115441972A CN115441972A CN202210998655.7A CN202210998655A CN115441972A CN 115441972 A CN115441972 A CN 115441972A CN 202210998655 A CN202210998655 A CN 202210998655A CN 115441972 A CN115441972 A CN 115441972A
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- China
- Prior art keywords
- ethernet
- train
- broadcasting system
- control unit
- passenger
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
- H04H20/62—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast for transportation systems, e.g. in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/20—Support for services
- H04L49/201—Multicast operation; Broadcast operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
Abstract
The invention discloses a digital train broadcasting system based on Ethernet, which comprises an Ethernet switch, a vehicle-mounted communication control unit, a passenger room loudspeaker, a communication control panel, a passenger alarm, a broadcasting environmental noise compensator and the like. The switch adopts a ring network connection mode, and provides a high-speed self-healing Ethernet network for data communication between the train vehicles. The two vehicle-mounted communication control units work simultaneously, are mutually hot-standby and exchange working states in real time through a train Ethernet network; the power amplifier integrated in the passenger room control unit is provided with two paths of independent power amplifier modules which respectively drive a group of loudspeakers of the vehicle and the adjacent vehicles. The invention avoids the loss of the broadcasting function of the train or the carriage caused by single-point failure through the self-healing ring Ethernet and the redundant configuration and the cross control of the train broadcasting system equipment, has the advantages of simple interface, remote maintenance support and the like, and can be widely applied to the full-automatic running rail transit train.
Description
Technical Field
The invention relates to the technical field of train broadcasting systems, in particular to a digital train broadcasting system based on Ethernet.
Background
The train broadcasting system is mainly used for broadcasting train operation information, and can perform emergency broadcasting, emergency talkback and alarming when an emergency or disaster occurs so as to command evacuation of passengers, dispatch of workers for emergency and relief work and reduce loss caused by accidents.
The digital train broadcasting system has simple interface, better expandability and compatibility and wide application. However, the redundancy function and the fault degradation service function of the existing digital train broadcasting system are not complete, and the train broadcasting function is lost due to double master control faults easily caused by network interruption; the failure of the passenger room control unit and the power amplifier can cause the loss of the broadcasting function of the carriage, which affects the operation service quality and the operation safety of the train, particularly the unmanned train.
Disclosure of Invention
In view of the above, the present invention is directed to a digital train broadcasting system based on ethernet, so as to solve the problem that the broadcasting function of a train or a train car is lost due to a single point of failure.
Based on the above purpose, the invention provides a digital train broadcasting system based on Ethernet, which comprises an Ethernet switch, a vehicle-mounted communication control unit, a passenger room control unit and a passenger room loudspeaker, wherein the Ethernet switch is connected with the vehicle-mounted communication control unit;
the Ethernet switch comprises a three-layer switch and a two-layer switch, at least two carriages of the Ethernet switch are arranged, the Ethernet switch has a terminal bypass function, a high-speed annular self-healing Ethernet for data communication is formed by adopting a ring network connection mode, and all terminal equipment in the Ethernet network is digitized and connected into the Ethernet;
the three-layer switch is used for managing communication interfaces of a train broadcasting system and a trackside system, and each train is provided with two communication interfaces;
the passenger room loudspeaker adopts a plurality of digital loudspeakers, the loudspeakers are divided into two groups, and each carriage is provided with a first loudspeaker group and a second loudspeaker group;
the train broadcasting system comprises a passenger room control unit, a power amplifier, a loudspeaker group and a train broadcasting system, wherein the passenger room control unit is distributed in each carriage, one power amplifier is arranged in each carriage, the power amplifier integrated in the passenger room control unit is provided with two independent power amplifier modules which are respectively connected with one loudspeaker group of the train and an adjacent train, and the corresponding loudspeaker group is driven by the power amplifier module when the train broadcasting system generates audio information;
the vehicle-mounted communication control unit is connected with the three-layer switch through an Ethernet line and used for controlling the work of the train broadcasting system, two train broadcasting systems are arranged for each train, the two train broadcasting systems work simultaneously and mutually serve as hot standby, and the work states are interacted in real time through the train Ethernet network. The vehicle-mounted communication control unit is connected to the train network control system through an Ethernet line, is used for information interaction between the train broadcasting system and the train, is connected to the coupler through the audio bus, and is used for train broadcasting after two trains are connected.
The train broadcasting system further comprises communication control panels, the communication control panels are distributed on the end cars, one end car is arranged on each end car, and the Ethernet network is accessed through an Ethernet switch by adopting a simultaneous working mode; the communication control panel comprises a touch screen and an earphone microphone, and can realize the full-duplex communication between the communication control panel and the control center, the full-duplex communication between the communication control panel and the passenger room, and the function of broadcasting to the passenger room by the communication control panel.
Furthermore, the train broadcasting system also comprises passenger alarms, the passenger alarms are distributed in each carriage, two passenger alarms are arranged in each carriage, and the passenger alarms are connected to the Ethernet network through different Ethernet switches in the carriages and used for passenger alarming and talkback.
Further, the train broadcasting system also comprises broadcasting environmental noise compensators which are distributed in each carriage and used for collecting the noise value of the passenger room and transmitting the noise value to the passenger room control unit through a data bus.
Furthermore, the vehicle-mounted communication control unit adopts a modular design, is arranged in a 3U industrial case and comprises a power supply module, a system control module, a media control module, a vehicle interface module with different interface types, a memory card and a data recorder.
Further, the train broadcasting system can be remotely maintained through the vehicle-mounted maintenance device and/or the ground maintenance device based on Ethernet communication.
From the above, it can be seen that the ethernet-based digital train broadcasting system provided by the invention adopts the three-layer switch to manage the communication interface between the train and the trackside system, the interface is simple, remote maintenance and control are supported, the loss of the broadcasting function of the train or the carriage caused by a single-point fault is avoided through the redundant configuration and the cross control of the self-healing ring ethernet network and the train broadcasting system equipment, and the influence of the fault on the normal operation of the train is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only one embodiment of the present description, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a digital train broadcasting system according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
The terms "first" and "second" used in the embodiments of the present specification do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The end cars refer to vehicles located at both ends of the train, and the intermediate cars refer to other vehicles except the end cars.
The embodiment of the specification provides an ethernet-based digital train broadcasting system for a four-consist train, which comprises a three-layer switch 1, a passenger room control unit 2 (SCU), an ethernet line 3, a passenger alarm 4 (PIP), a passenger room speaker 5 (SPKR), a communication control panel 6 (HAP), a vehicle communication control unit 7 (VCCU), a broadcast environmental noise compensator 8 (ANC), a two-layer switch 9, an audio bus 10 and a data bus 11, as shown in fig. 1.
The three-layer switchboard 1 is distributed at the end vehicles, one for each vehicle; the two-layer switches 9 are distributed in the middle vehicle, and each vehicle is provided with one switch; two-layer switches integrated in a passenger room control unit 2 (SCU) are distributed in each carriage, and each vehicle is provided with one switch. The two-tier switch integrated in the passenger room control unit 2 is connected to the three-tier switch 1 in the same car through the ethernet line 3 and to the two-tier switch 9 in its adjacent car through the ethernet line 3 to form a ring-shaped self-healing ethernet network, providing data communication between the train vehicles and allowing transmission of vehicle audio, video and data to the control center. The network system supports the QoS function, reasonably plans and allocates network resources according to the characteristics of various services, and enables the network resources to be efficiently utilized. The transmission priority of the network data is set as follows: the control information is higher than the audio data than the video data.
The Ethernet switch has a terminal bypass function, and network communication interruption caused by single-point failure is avoided. The switch adopts M12 Ethernet ports, all terminal equipment are digitalized and connected into the Ethernet, and each PoE port can provide 30W of power to supply power for low-power-consumption equipment.
The three-layer switch 1 is used for a communication interface between a train broadcasting system and a trackside system, adopts a dynamic host configuration protocol DHCP, automatically allocates an IP address of terminal equipment, manages a network and ensures that only authorized communication is available.
The passenger room loudspeaker 5 (SPKR) adopts a digital loudspeaker, each vehicle is 8 and is divided into two groups, and each carriage is provided with a first loudspeaker group and a second loudspeaker group.
The guest room control unit 2 (SCU) is a master control device for guest room broadcasting, and each car is provided with one. The guest room control unit 2 is in a modular design and comprises a power supply module, a power amplifier, a two-layer switch, a video storage device, an interface module and the like, wherein the power amplifier is provided with two independent power amplifier modules. The two independent power amplifier modules are respectively connected with the loudspeaker groups of the passenger rooms of the vehicle and the adjacent vehicles through the audio bus 10, and the corresponding loudspeaker groups of the passenger rooms are driven when the train broadcasting system generates audio information, so that at least half of the loudspeakers of the vehicles can broadcast normally when a certain power amplifier fails, and the reliability of the broadcasting function of the passenger rooms is improved.
The vehicle-mounted communication control unit 7 (VCCU) is a control core of the train broadcasting system, each end car is provided with one end car, works simultaneously, is mutually hot-standby, and is connected with the three-layer switch 1 through the Ethernet bus for controlling the work of the whole train broadcasting system, monitoring the working states of the system and equipment and diagnosing faults through the Ethernet line 3. The vehicle-mounted communication control unit 7 is in a modular design, is arranged in a 3U industrial case, comprises a power supply module, a system control module, a media control module, vehicle interface modules with different interface types, a memory card, a data recorder and the like, and can perform system test, fault diagnosis, log downloading, software upgrading and modification, prerecorded file updating and the like through a maintenance interface.
As an implementation manner, the vehicle-mounted communication control unit 7 is connected with a train network control system (TCMS) through the ethernet line 3, the train network system (TCMS) controls the defined master VCCUs in a unified manner, when the master end fails, the master VCCUs reports to the TCMS, and the TCMS controls another VCCU to take over to work, so as to ensure that the VCCU functions are not affected. The on-board communication control unit 7 is also connected to a COUPLER (COUPLER) via an audio bus 10 for train broadcasting after two trains are coupled.
The communication control panels 6 (HAP) are distributed on the end cars, one is arranged on each end car, and are connected with the two-layer switchboard integrated in the passenger room control unit 2 through the Ethernet cable 3 for driver broadcasting. The communication control panels 6 at the two ends adopt a simultaneous working mode, and the fault of the communication control panel at one end does not influence the normal use of the communication control panel at the other end.
The communication control panel 6 comprises a touch screen and a headset, provides functional operation interfaces such as full duplex communication between the HAP and the OCC of the control center, full duplex communication between the HAP and the HAP, broadcasting function between the HAP and a passenger room, full duplex communication between the HAP and a PIP and the like for train operators, and indicates the working state of operation through an operation button indicator lamp.
The passenger alarms 4 (PIP) are redundantly arranged at proper positions of carriages, two PIPs are arranged in each carriage, and the passenger alarms 4 are respectively connected with the three-layer switch 1, the two-layer switch 9 and the two-layer switch integrated on the passenger room control unit 2 through the Ethernet lines 3 to a train communication system backbone network for passenger alarm and talkback in emergency. When a certain passenger alarm or an exchanger has a fault, half of the passenger alarms of the vehicle can still be ensured to be normally used.
The passenger alarm 4 is integrated with a speaker, a microphone, a camera, an emergency talkback button, an LED indicator light, and the like, and is provided with an operation instruction. In an emergency situation, a user can open the emergency button protective cover and press the emergency talkback button to request the control center to carry out full-duplex conversation. The call voice is recorded and named and stored in the mode of PIP number plus activation time.
The broadcasting environmental noise compensators 8 (ANC) are distributed in each carriage, one of which is arranged in each carriage, connected with the guest room control unit 2 through a data bus 11 and used for collecting the noise value of the guest room and transmitting the noise value to the guest room control unit 2 as the input for the guest room control unit 2 to adjust the power amplifier output of the carriage.
The following broadcasting functions can be realized by the train broadcasting system:
the VCCU receives the control signal of the train control system, and automatically finishes the automatic broadcasting such as outbound broadcasting, inbound broadcasting and the like according to the obtained station reporting information. The train control system can also trigger the pre-recorded public broadcast message through a trigger instruction to automatically broadcast.
The control center broadcast function is that the control center operator can select the train or the carriage to pre-record and broadcast the passenger room, and can also perform artificial voice broadcast. The digital audio signals are transmitted to the vehicle-mounted VCCU through a vehicle-ground wireless network, and are sent to each loudspeaker after power amplification.
And the driver broadcasting function is that the driver can broadcast or pre-record the broadcast to the whole train or any carriage through the driver control panel.
Preferably, the ethernet cable 3 uses a Cat7 cable to reduce crosstalk when forming a train communication system backbone network and interfacing the vehicle with an external device, and uses a Cat5e cable when connecting an ethernet switch with train communication system equipment such as a VCCU.
As an optimization scheme of the embodiment of the invention, the communication interface types of the train broadcasting system, the trackside related system and the train network control system (TCMS) can be adjusted according to the requirements of the related systems.
Compared with the prior art, the invention has the following beneficial effects:
the full-digital train broadcasting system based on Ethernet transmission avoids network communication interruption and broadcasting function loss caused by single-point failure through the redundant configuration and cross control of the self-healing ring Ethernet network and the train broadcasting system equipment, and has the advantages of simple interface, remote maintenance and control support and the like.
Those of ordinary skill in the art will understand that: the foregoing embodiments are provided for illustrative purposes only and are not intended to limit the scope of the invention, which is to be accorded the full scope consistent with the claims.
Claims (8)
1. A digital train broadcasting system based on Ethernet is characterized by comprising an Ethernet switch, a vehicle-mounted communication control unit, a passenger room control unit and a passenger room loudspeaker;
the Ethernet switch comprises a three-layer switch and a two-layer switch, at least two carriages of the Ethernet switch are arranged, the Ethernet switch has a terminal bypass function, a high-speed annular self-healing Ethernet network for data communication is formed by adopting a ring network connection mode, and all terminal equipment in the Ethernet network is digitized and connected into the Ethernet;
the three-layer switch is used for managing communication interfaces of a train broadcasting system and a trackside system, and each train is provided with two communication interfaces;
the passenger room loudspeakers are digital loudspeakers and are divided into two groups, and each carriage is provided with a first loudspeaker group and a second loudspeaker group;
the passenger room control unit is distributed in each carriage, each carriage is provided with one, the power amplifier integrated in the passenger room control unit is provided with two paths of independent power amplifier modules which are respectively connected with one loudspeaker group of the vehicle and an adjacent vehicle, and the corresponding loudspeaker groups are driven by the power amplifier modules when the train broadcasting system generates audio information;
the vehicle-mounted communication control unit is connected with the three-layer switch through an Ethernet line and used for controlling the work of the train broadcasting system, two are arranged in each train, the train and the communication control unit work simultaneously and mutually serve as hot standby, and the work states are interacted in real time through the train Ethernet network.
2. The ethernet-based digital train broadcasting system of claim 1, wherein the on-board communication control unit is connected to the train network control system through an ethernet cable for information interaction between the train broadcasting system and the train, and is connected to the car coupler through an audio bus for train broadcasting after two trains are connected.
3. The ethernet-based digital train broadcasting system of claim 1, further comprising a communication control panel, wherein the communication control panel is distributed at the end cars, one is arranged at each end car, and the ethernet network is accessed through the ethernet switch by adopting a simultaneous operation mode.
4. The Ethernet-based digital train broadcasting system of claim 3, wherein the communication control panel comprises a touch screen and a headset, and can realize full duplex communication between the communication control panel and the control center, full duplex communication between the communication control panels, and broadcasting of the communication control panel to the passenger room.
5. The ethernet-based digital train broadcasting system according to claim 1, further comprising passenger alarms, wherein the passenger alarms are distributed in each car, two are provided in each car, and the passenger alarms access the ethernet network through different ethernet switches in the car for passenger alarm and talkback.
6. The ethernet-based digital train broadcasting system according to claim 1, further comprising a broadcasting ambient noise compensator distributed in each car for collecting a noise value of the passenger compartment and transmitting the noise value to the passenger compartment control unit through a data bus.
7. The ethernet-based digital train broadcasting system according to claim 1, wherein the on-board communication control unit is of a modular design, is disposed in a 3U industrial chassis, and comprises a power supply module, a system control module, a media control module, a vehicle interface module with different interface types, a memory card and a data recorder.
8. The ethernet-based digital train broadcasting system according to claim 1, wherein the train broadcasting system can be remotely maintained through an on-board maintenance device and/or a ground maintenance device based on ethernet communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210998655.7A CN115441972A (en) | 2022-08-19 | 2022-08-19 | Digital train broadcasting system based on Ethernet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210998655.7A CN115441972A (en) | 2022-08-19 | 2022-08-19 | Digital train broadcasting system based on Ethernet |
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| Publication Number | Publication Date |
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| CN115441972A true CN115441972A (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210998655.7A Pending CN115441972A (en) | 2022-08-19 | 2022-08-19 | Digital train broadcasting system based on Ethernet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116279657A (en) * | 2022-12-06 | 2023-06-23 | 大连海天兴业科技有限公司 | Bus type train passenger information system based on OFDM |
-
2022
- 2022-08-19 CN CN202210998655.7A patent/CN115441972A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116279657A (en) * | 2022-12-06 | 2023-06-23 | 大连海天兴业科技有限公司 | Bus type train passenger information system based on OFDM |
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